How to remove styles when copying text in tinymce wordpress?

Question

JavaScript

Goodnight. Strictly speaking subject. I tried almost everything, but when copying text from the site, tinymce still pulls up the styles. The filter now stands with the following settings:

function my_format_TinyMCE( $in ) {
  global $post;
    $post_type = get_post_type( $post->ID );
    if( $post_type == 'pubedit'){
    $in['remove_linebreaks'] = false;
    $in['gecko_spellcheck'] = false;
    $in['keep_styles'] = false;
    $in['accessibility_focus'] = false;
    $in['tabfocus_elements'] = 'major-publishing-actions';
    $in['media_strict'] = false;
    $in['paste_remove_styles'] = true;
    $in['paste_remove_spans'] = true;
    $in['paste_strip_class_attributes'] = 'none';
    $in['paste_text_use_dialog'] = false;
    $in['wpeditimage_disable_captions'] = true;
    $in['plugins'] = 'wordpress,wplink';
    //$in['content_css'] = get_template_directory_uri() . "/editor-style.css";
    $in['wpautop'] = true;
    $in['apply_source_formatting'] = false;
    $in['block_formats'] = "Paragraph=p";
    $in['toolbar1'] = 'bold, italic, underline, strikethrough, link, unlink';
    $in['toolbar2'] = '';
    $in['toolbar3'] = '';
    $in['toolbar4'] = '';
    return $in;
  } else {
    $in['toolbar1'] = 'bold,italic,strikethrough,bullist,numlist,blockquote,hr,alignleft,aligncenter,alignright,link,unlink,wp_more,spellchecker,wp_fullscreen,wp_adv ';
    $in['toolbar2'] = 'formatselect,underline,alignjustify,forecolor,pastetext,removeformat,charmap,outdent,indent,undo,redo,wp_help ';
    $in['toolbar3'] = '';
    $in['toolbar4'] = '';
    return $in;
  }
}
add_filter( 'tiny_mce_before_init', 'my_format_TinyMCE' );

If anyone faced similar problem, please advise how to solve it.

Ps I can copy without styles on my own, it is important for me that site users cannot copy styles.

Answer 1

Still solved the problem. Even I completely forgot to connect the tinymce paste plugin.
As a result, it is enough to make the following settings:

function my_format_TinyMCE( $in ) {
  $in['keep_styles'] = false;
  $in['paste_remove_styles'] = true;
  $in['paste_remove_spans'] = true;
  $in['paste_as_text'] = true;
  $in['plugins'] = 'wordpress,wplink,paste';
  return $in;
}
add_filter( 'tiny_mce_before_init', 'my_format_TinyMCE' );

Most importantly, this will prevent any user from pasting text while maintaining styles.

Answer 2

In this case, I insert not in visual, but in text mode.

Answer 3

ctrl+shift+v

Paste as text.